x402basequality 0.30

x402-gated product inventory endpoint on Base, pay-per-call with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/40/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 40) via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated behind x402 micropayments on the Base network using USDC.

The specific endpoint `/api/v1/products/40/inventory` is listed as "Premium API Access" and accepts POST requests. Payment is settled on-chain on Base using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each call.

Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the inventory endpoint actually returns. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body is expected or what shape the response takes.

Capabilities

x402-paymentusdc-settlementbase-networkproduct-inventorypay-per-requestno-api-key

Use cases

  • —Querying inventory status for a specific product via micropayment
  • —Integrating pay-per-call product data into an agent workflow
  • —Accessing product information without API key registration

Fit

Best for

  • —Agents that can settle x402 payments on Base with USDC
  • —Developers wanting zero-signup, pay-per-request product data
  • —Micropayment-native workflows needing inventory checks

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integration
  • —High-volume bulk inventory queries where per-call pricing is inefficient
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/40/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/40/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the purpose of 'Premium API Access' for product 40 inventory is unexplained. The listing is effectively a stub.

Warnings

  • —No documentation available — all doc/pricing/API/README pages render only 'Connect wallet'
  • —No OpenAPI or request/response schema provided
  • —The specific purpose and data returned by the /products/40/inventory endpoint is unknown
  • —Cannot verify what data the endpoint actually returns without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:16:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/bKCeec
x402-gated product inventory endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart